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<head><meta charset="utf-8"><title>pre-meeting triage 2020-01-16 #54818 · t-compiler · Zulip Chat Archive</title></head>
<h2>Stream: <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/index.html">t-compiler</a></h2>
<h3>Topic: <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html">pre-meeting triage 2020-01-16 #54818</a></h3>

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<a name="185779917"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185779917" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185779917">(Jan 16 2020 at 02:33)</a>:</h4>
<p>starting the pre-triage process many hours before the meeting again this week</p>



<a name="185780402"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185780402" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185780402">(Jan 16 2020 at 02:45)</a>:</h4>
<p>we have 9 <a href="https://github.com/rust-lang/rust/issues?utf8=%E2%9C%93&amp;q=is%3Aopen+is%3Aissue+label%3AT-compiler+-label%3AP-high++-label%3AP-medium+-label%3AP-low+label%3AI-nominated" target="_blank" title="https://github.com/rust-lang/rust/issues?utf8=%E2%9C%93&amp;q=is%3Aopen+is%3Aissue+label%3AT-compiler+-label%3AP-high++-label%3AP-medium+-label%3AP-low+label%3AI-nominated">nominated unprioritized issues</a></p>



<a name="185780492"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185780492" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185780492">(Jan 16 2020 at 02:47)</a>:</h4>
<p>nom unpri 1/9: "Mutex and RwLock are unsound in presence of discriminant elision" <a href="https://github.com/rust-lang/rust/issues/68206" target="_blank" title="https://github.com/rust-lang/rust/issues/68206">#68206</a></p>



<a name="185780540"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185780540" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185780540">(Jan 16 2020 at 02:48)</a>:</h4>
<p>this is probably going to end up being a T-lang + T-libs issue. I cannot imagine it being something that we try to resolve in the compiler itself.</p>



<a name="185780572"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185780572" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185780572">(Jan 16 2020 at 02:49)</a>:</h4>
<p>Though the compiler team <em>can</em> fix the immediate soundness issue by "just" disallowing <code>UnsafeCell&lt;T&gt;</code> to expose the same niche as <code>T</code>.</p>



<a name="185780628"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185780628" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185780628">(Jan 16 2020 at 02:50)</a>:</h4>
<p>(The only other option I can imagine is to say that it is the duty of library authors to figure out what combination of <code>UnsafeCell :: * -&gt; *</code> and <code>MaybeUninitialized :: * -&gt; *</code>  they need for their particular abstract data type...)</p>



<a name="185780864"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185780864" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185780864">(Jan 16 2020 at 02:56)</a>:</h4>
<p>anyway lets call this P-high, there is at least one clear way to address the soundness issue here; the only question is whether it is the way we want (i.e. whether we can swallow losing the niche optimization for <code>Cell&lt;T&gt;</code>)</p>



<a name="185780891"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185780891" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185780891">(Jan 16 2020 at 02:57)</a>:</h4>
<p>(gotta pause for family stuff)</p>



<a name="185782678"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185782678" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185782678">(Jan 16 2020 at 03:35)</a>:</h4>
<p>so yeah, <a href="https://github.com/rust-lang/rust/issues/68206" target="_blank" title="https://github.com/rust-lang/rust/issues/68206">#68206</a> is P-high but I'm leaving the I-nominated tag.</p>



<a name="185782683"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185782683" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185782683">(Jan 16 2020 at 03:35)</a>:</h4>
<p>nom unpri 2/9: "SystemV ABI Mismatch on x86 with a <code>repr(C) enum</code> for <code>extern "C"</code>/FFI functions." <a href="https://github.com/rust-lang/rust/issues/68190" target="_blank" title="https://github.com/rust-lang/rust/issues/68190">#68190</a></p>



<a name="185782737"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185782737" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185782737">(Jan 16 2020 at 03:36)</a>:</h4>
<p>This is probably T-lang too as well. Adding tag.</p>



<a name="185782829"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185782829" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185782829">(Jan 16 2020 at 03:39)</a>:</h4>
<p>(though its possible its "just" a compiler bug. Cannot tell yet.)</p>



<a name="185782831"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185782831" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185782831">(Jan 16 2020 at 03:39)</a>:</h4>
<p>anyway, I'm leaving the nominated tag on this, and explicitly not attempting to triage it</p>



<a name="185782962"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185782962" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185782962">(Jan 16 2020 at 03:43)</a>:</h4>
<p>(and I put it on the explicit list of nominated issues on the <a href="https://hackmd.io/ruw4k37lSJ6RDVOFfhdQ7Q?edit" target="_blank" title="https://hackmd.io/ruw4k37lSJ6RDVOFfhdQ7Q?edit">hackmd</a> I just allocated.)</p>



<a name="185782974"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185782974" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185782974">(Jan 16 2020 at 03:43)</a>:</h4>
<p>nom unpri 3/9: "[spurious] thread 'rustc' panicked at 'slice index starts at 24722962 but ends at 13279232', src/libcore/slice/mod.rs:2680:5" <a href="https://github.com/rust-lang/rust/issues/68132" target="_blank" title="https://github.com/rust-lang/rust/issues/68132">#68132</a></p>



<a name="185783044"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185783044" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185783044">(Jan 16 2020 at 03:45)</a>:</h4>
<p>not sure we're going to be able to do much with this bug as written...</p>



<a name="185783101"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185783101" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185783101">(Jan 16 2020 at 03:46)</a>:</h4>
<p>there is at least a backtrace, but the problem itself is arising with a "custom codegen backend". The failure happens while compiling hashbrown but who knows what overall context is for actual reproduction.</p>



<a name="185783198"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185783198" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185783198">(Jan 16 2020 at 03:49)</a>:</h4>
<p>wrote a comment. Not really willing to put a priority label down yet.</p>



<a name="185783204"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185783204" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185783204">(Jan 16 2020 at 03:50)</a>:</h4>
<p>nom unpri 4/9: "rustc panics when compiling code that uses tokio's LocalSet" <a href="https://github.com/rust-lang/rust/issues/68109" target="_blank" title="https://github.com/rust-lang/rust/issues/68109">#68109</a></p>



<a name="185783255"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185783255" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185783255">(Jan 16 2020 at 03:50)</a>:</h4>
<p>this is believed to be fixed</p>



<a name="185783258"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185783258" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185783258">(Jan 16 2020 at 03:50)</a>:</h4>
<p><a href="https://github.com/rust-lang/rust/issues/68109" target="_blank" title="https://github.com/rust-lang/rust/issues/68109">#68109</a>: P-high, removing nomination label.</p>



<a name="185783271"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185783271" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185783271">(Jan 16 2020 at 03:51)</a>:</h4>
<p>nom unpri 5/9: "broken MIR (NoSolution) in closure with a parameter whose type is an alias for a reference to an associated type" <a href="https://github.com/rust-lang/rust/issues/68090" target="_blank" title="https://github.com/rust-lang/rust/issues/68090">#68090</a></p>



<a name="185783388"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185783388" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185783388">(Jan 16 2020 at 03:54)</a>:</h4>
<p><a href="https://github.com/rust-lang/rust/issues/68090" target="_blank" title="https://github.com/rust-lang/rust/issues/68090">#68090</a>: P-high, removing nomination label</p>



<a name="185784138"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784138" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784138">(Jan 16 2020 at 04:13)</a>:</h4>
<p>nom unpri 6/9: "<code>miri</code> no longer builds after <a href="https://github.com/rust-lang/rust/issues/68078" target="_blank" title="https://github.com/rust-lang/rust/issues/68078">rust-lang/rust#68078</a>" <a href="https://github.com/rust-lang/rust/issues/68081" target="_blank" title="https://github.com/rust-lang/rust/issues/68081">#68081</a></p>



<a name="185784143"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784143" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784143">(Jan 16 2020 at 04:13)</a>:</h4>
<p><a href="https://github.com/rust-lang/rust/issues/68081" target="_blank" title="https://github.com/rust-lang/rust/issues/68081">#68081</a>: P-medium, removing nomination label.</p>



<a name="185784153"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784153" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784153">(Jan 16 2020 at 04:14)</a>:</h4>
<p>nom unpri 7/9: "<code>rls</code> no longer builds after <a href="https://github.com/rust-lang/rust/issues/68047" target="_blank" title="https://github.com/rust-lang/rust/issues/68047">rust-lang/rust#68047</a>" <a href="https://github.com/rust-lang/rust/issues/68068" target="_blank" title="https://github.com/rust-lang/rust/issues/68068">#68068</a></p>



<a name="185784195"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784195" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784195">(Jan 16 2020 at 04:14)</a>:</h4>
<p><a href="https://github.com/rust-lang/rust/issues/68068" target="_blank" title="https://github.com/rust-lang/rust/issues/68068">#68068</a>: P-medium, removing nomination label.</p>



<a name="185784293"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784293" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784293">(Jan 16 2020 at 04:17)</a>:</h4>
<p>nom unpri 8/9: "Project fails to link when using dylibs and the -Zshare-generics flag" <a href="https://github.com/rust-lang/rust/issues/67276" target="_blank" title="https://github.com/rust-lang/rust/issues/67276">#67276</a></p>



<a name="185784446"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784446" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784446">(Jan 16 2020 at 04:21)</a>:</h4>
<p>based on the comment thread, I don't think this is (currently) a T-compiler issue.</p>



<a name="185784540"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784540" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784540">(Jan 16 2020 at 04:23)</a>:</h4>
<p><span class="user-mention" data-user-id="126931">@centril</span> why did you remove the T-libs tag from the above? I missed the relevant T-lang meeting last week so maybe there is  relevant context I'm missing.</p>



<a name="185784554"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784554" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784554">(Jan 16 2020 at 04:24)</a>:</h4>
<p>which one?</p>



<a name="185784655"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784655" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784655">(Jan 16 2020 at 04:25)</a>:</h4>
<p><span class="user-mention" data-user-id="116083">@pnkfelix</span></p>



<a name="185784664"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784664" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784664">(Jan 16 2020 at 04:26)</a>:</h4>
<p><a href="https://github.com/rust-lang/rust/issues/67276" target="_blank" title="https://github.com/rust-lang/rust/issues/67276">#67276</a></p>



<a name="185784704"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784704" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784704">(Jan 16 2020 at 04:26)</a>:</h4>
<p>or wait</p>



<a name="185784707"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784707" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784707">(Jan 16 2020 at 04:26)</a>:</h4>
<p>did I jump ahead ...</p>



<a name="185784710"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784710" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784710">(Jan 16 2020 at 04:26)</a>:</h4>
<p>ugh sorry</p>



<a name="185784713"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784713" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784713">(Jan 16 2020 at 04:26)</a>:</h4>
<p>my fault, its too late at night</p>



<a name="185784736"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784736" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784736">(Jan 16 2020 at 04:27)</a>:</h4>
<p>everything from the "based on the comment thread, I don't think this is (currently) a T-compiler issue." and after that was regarding the last nom unpri issue, namely</p>



<a name="185784782"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784782" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784782">(Jan 16 2020 at 04:28)</a>:</h4>
<p>nom unpri 9/8: "PartialEq implementation for RangeInclusive is unsound" <a href="https://github.com/rust-lang/rust/issues/67194" target="_blank" title="https://github.com/rust-lang/rust/issues/67194">#67194</a></p>



<a name="185784786"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784786" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784786">(Jan 16 2020 at 04:28)</a>:</h4>
<p>so <span class="user-mention" data-user-id="126931">@centril</span> my Q was regarding <a href="https://github.com/rust-lang/rust/issues/67194" target="_blank" title="https://github.com/rust-lang/rust/issues/67194">#67194</a></p>



<a name="185784799"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784799" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784799">(Jan 16 2020 at 04:28)</a>:</h4>
<p><span class="user-mention" data-user-id="116083">@pnkfelix</span> t-lang decided what to do (see Niko's comment) and now it needs execution</p>



<a name="185784811"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784811" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784811">(Jan 16 2020 at 04:29)</a>:</h4>
<p>but the thing to do was to remove a specialization impl</p>



<a name="185784812"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784812" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784812">(Jan 16 2020 at 04:29)</a>:</h4>
<p>right</p>



<a name="185784815"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784815" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784815">(Jan 16 2020 at 04:29)</a>:</h4>
<p>that's a T-libs <del>take</del> task, not a T-compiler one, right?</p>



<a name="185784818"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784818" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784818">(Jan 16 2020 at 04:29)</a>:</h4>
<p>in terms of determining fallout etc?</p>



<a name="185784868"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784868" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784868">(Jan 16 2020 at 04:30)</a>:</h4>
<p>I'm happy to go and try to do it, in terms of making a quick PR and requesting a perf run</p>



<a name="185784872"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784872" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784872">(Jan 16 2020 at 04:30)</a>:</h4>
<p><span class="user-mention" data-user-id="116083">@pnkfelix</span> my take is that "implementation details" are t-compiler and "specification / public API" matters are T-lang &amp; t-libs respectively</p>



<a name="185784884"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784884" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784884">(Jan 16 2020 at 04:30)</a>:</h4>
<p>hmm I don't know, implementation details of the stdlib I always figured was the domain of T-libs, at least if it doesn't involve adding/using compiler intrinstics...</p>



<a name="185784963"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784963" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784963">(Jan 16 2020 at 04:32)</a>:</h4>
<p>I suppose it can be both? Anyways; t-compiler feels more active so I thought it would get things done quicker</p>



<a name="185784984"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784984" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784984">(Jan 16 2020 at 04:32)</a>:</h4>
<p>I'm going to put T-libs back on just so they remain in the loop. The nomination can maybe be removed, I guess.</p>



<a name="185784992"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784992" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784992">(Jan 16 2020 at 04:32)</a>:</h4>
<p>and I'll call this P-high</p>



<a name="185784996"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784996" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784996">(Jan 16 2020 at 04:32)</a>:</h4>
<p>sgtm</p>



<a name="185784997"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185784997" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185784997">(Jan 16 2020 at 04:32)</a>:</h4>
<p>as in</p>



<a name="185785016"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185785016" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185785016">(Jan 16 2020 at 04:33)</a>:</h4>
<p><a href="https://github.com/rust-lang/rust/issues/67194" target="_blank" title="https://github.com/rust-lang/rust/issues/67194">#67194</a>: P-high, removing nomination label, adding T-libs label.</p>



<a name="185785022"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185785022" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185785022">(Jan 16 2020 at 04:33)</a>:</h4>
<p>thanks for filling me in</p>



<a name="185785031"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185785031" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185785031">(Jan 16 2020 at 04:33)</a>:</h4>
<p><span aria-label="slight smile" class="emoji emoji-1f642" role="img" title="slight smile">:slight_smile:</span></p>



<a name="185785035"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185785035" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185785035">(Jan 16 2020 at 04:33)</a>:</h4>
<p>/me tunes out to watch the last democratic debate</p>



<a name="185785263"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185785263" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185785263">(Jan 16 2020 at 04:38)</a>:</h4>
<p>(I wonder if we could make a lint to catch the pattern that niko described in <a href="https://github.com/rust-lang/rust/issues/67194#issuecomment-572798406" target="_blank" title="https://github.com/rust-lang/rust/issues/67194#issuecomment-572798406">their comment</a>)</p>



<a name="185785287"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185785287" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185785287">(Jan 16 2020 at 04:39)</a>:</h4>
<p>(iirc that was suggested in the meeting -- sounds like a good idea potentially)</p>



<a name="185786065"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185786065" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185786065">(Jan 16 2020 at 04:58)</a>:</h4>
<blockquote>
<p>pnkfelix: there is at least a backtrace, but the problem itself is arising with a "custom codegen backend". The failure happens while compiling hashbrown but who knows what overall context is for actual reproduction.<br>
pnkfelix: wrote a comment. Not really willing to put a priority label down yet.</p>
</blockquote>
<p>I would say P-medium and let bjorn3 figure it out as part of integrating cranelift</p>



<a name="185786088"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185786088" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185786088">(Jan 16 2020 at 04:59)</a>:</h4>
<blockquote>
<p>Though the compiler team can fix the immediate soundness issue by "just" disallowing UnsafeCell&lt;T&gt; to expose the same niche as T.</p>
</blockquote>
<p>If it isn't a big hassle, I think it would be worthwhile to do this before the language team meeting experimentally for perf to have that data available in the meeting</p>



<a name="185786153"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185786153" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185786153">(Jan 16 2020 at 05:00)</a>:</h4>
<blockquote>
<p>If it isn't a big hassle, I think it would be worthwhile to do this before the language team meeting experimentally for perf to have that data available in the meeting</p>
</blockquote>
<p>yeah I'm trying to put together that PR now</p>



<a name="185787281"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185787281" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185787281">(Jan 16 2020 at 05:32)</a>:</h4>
<p>Now I'm curious if this breaks the guarantees of <code>#[repr(transparent)]</code> on <code>struct UnsafeCell</code>. I'll have to go and review that RFC.</p>



<a name="185787451"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185787451" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185787451">(Jan 16 2020 at 05:36)</a>:</h4>
<p>ah i'm getting all kinds of <a href="https://github.com/rust-lang/rfcs/pull/2645#issuecomment-470699497" target="_blank" title="https://github.com/rust-lang/rfcs/pull/2645#issuecomment-470699497">deja vu</a></p>



<a name="185788004"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185788004" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185788004">(Jan 16 2020 at 05:53)</a>:</h4>
<p>specifically this <a href="https://github.com/rust-lang/rfcs/pull/2645#issuecomment-471063159" target="_blank" title="https://github.com/rust-lang/rfcs/pull/2645#issuecomment-471063159">note</a> from <span class="user-mention" data-user-id="120791">@RalfJ</span> : "<code>repr(transparent)</code> in struct and enum guarantees that all three of them are the same, but on unions it can only guarantee that the first two are the same"</p>



<a name="185788057"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185788057" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185788057">(Jan 16 2020 at 05:54)</a>:</h4>
<p>Including the desirata that <code>#[repr(transparent)]</code> passes the niche through to the surrounding context may have been premature.  Or at least, I don't see the motivation yet.</p>



<a name="185818682"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185818682" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Charles Lew <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185818682">(Jan 16 2020 at 14:24)</a>:</h4>
<p><a href="https://github.com/rust-lang/rust/issues/67743" target="_blank" title="https://github.com/rust-lang/rust/issues/67743">https://github.com/rust-lang/rust/issues/67743</a> has been blocking Rust Playground nightly version's build for a few (14+) days. Very personally i wish it be nominated a little...</p>



<a name="185818727"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185818727" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185818727">(Jan 16 2020 at 14:25)</a>:</h4>
<p>well lets add that to the nominated issues</p>



<a name="185820012"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185820012" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mati865 <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185820012">(Jan 16 2020 at 14:40)</a>:</h4>
<p>When <code>T-compiler</code> nominated PRs are usually discussed?<br>
<a href="https://github.com/rust-lang/rust/pulls?q=is%3Aopen+is%3Apr+label%3AT-compiler+label%3AI-nominated" target="_blank" title="https://github.com/rust-lang/rust/pulls?q=is%3Aopen+is%3Apr+label%3AT-compiler+label%3AI-nominated">https://github.com/rust-lang/rust/pulls?q=is%3Aopen+is%3Apr+label%3AT-compiler+label%3AI-nominated</a></p>



<a name="185820755"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185820755" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> oli <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185820755">(Jan 16 2020 at 14:48)</a>:</h4>
<p>when/if we get to them, they are the last thing before check ins</p>



<a name="185820768"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185820768" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> oli <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185820768">(Jan 16 2020 at 14:48)</a>:</h4>
<p>see <a href="https://hackmd.io/ruw4k37lSJ6RDVOFfhdQ7Q?edit" target="_blank" title="https://hackmd.io/ruw4k37lSJ6RDVOFfhdQ7Q?edit">https://hackmd.io/ruw4k37lSJ6RDVOFfhdQ7Q?edit</a></p>



<a name="185820810"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185820810" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> oli <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185820810">(Jan 16 2020 at 14:48)</a>:</h4>
<p>oh wait, that is issues</p>



<a name="185820988"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185820988" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mati865 <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185820988">(Jan 16 2020 at 14:50)</a>:</h4>
<p>that's why I asked <span aria-label="sweat smile" class="emoji emoji-1f605" role="img" title="sweat smile">:sweat_smile:</span></p>



<a name="185821131"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/pre-meeting%20triage%202020-01-16%20%2354818/near/185821131" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> oli <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-01-16.20.2354818.html#185821131">(Jan 16 2020 at 14:52)</a>:</h4>
<p>I added them</p>



<hr><p>Last updated: Aug 07 2021 at 22:04 UTC</p>
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